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Physics Past Questions

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137 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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137 questions

Question 1 of 20 137 total questions

Question 51

jamb 2018

An object moves in a circular path of radius 0.5m with a speed of 1ms\(^{-1}\). What is its angular velocity?

A8rads\(^{-1}\)

B4rads\(^{-1}\)

C1rads\(^{-1}\)

D2rads\(^{-1}\)

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Question 52

jamb 2018

In homes, electrical appliances and lamps are connected in parallel because

Aless current will be used

Bless voltage will be used

Cparallel connection does not heat up the wires

Dseries connection uses high voltage

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Question 53

jamb 2018

In the diagram shown, If the south-poles of two magnets stroke a steel bar, the polarities at T and V will respectively be

Anorth and south

Bsouth and south

Cnorth and north

Dsouth and north

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Question 54

jamb 2018

Musical instruments playing the same note can be distinguished from one another owing to the difference in their

Aquality

Bpitch

Cintensity

Dloudness

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Question 55

jamb 2018

Convex mirrors are used as driving mirrors because images formed are

Aerect, Virtual and diminished

Berect, real and diminished

Cerect, virtual and magnified

Dinverted, virtual and diminished

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Question 56

jamb 2018

The differences observed in solids, liquids and gases may be accounted for by

Atheir relative masses

Btheir melting points

Cthe spacing and forces acting between the molecules

Dthe different molecules in each of them

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Question 57

jamb 2018

The process whereby a liquid turns spontaneously into vapour is called

Aregelation

Bevaporation

Cboiling

Dsublimation

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Question 58

jamb 2018

Electrical appliances in homes are normally earthed so that

Aa person touching the appliances is safe from electric shock

Bboth the a.c. and d.c. sources can be used

Cthe appliances are maintained at a higher pd than the earth

Dthe appliances are maintained at a lower pd than the earth

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Question 59

jamb 2018

A positively charged rod X is brought near an uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that Y has

Ano charge and a zero potential

Ba positive charge and a zero potential

Ca negative charge and a positive potential

Da negative charge and a negative potential

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Question 60

jamb 2018

The time rate of loss of heat by a body is proportional to the

Atemperature of its surroundings

Btemperature of the body

Cdifference in temperature between the body and its surroundings

Dratio of the temperature of the body to that of its surroundings

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Question 61

jamb 2018

In the diagram shown, which of the simple pendulum will resonate with P when set into oscillation?

CR and T

DQ and R

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Question 62

jamb 2018

If the fraction of the atoms of a radioactive material left after 120years is \(\frac{1}{64}\), what is the half-life of the material? \(\frac{1}{64}\)

A20 years

B10 years

C2 years

D24 years

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Question 63

jamb 2018

In a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively. What is the voltage across the capacitor?

A30V

B70V

C50V

D40V

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Question 64

jamb 2018

A lead bullet of mass 0.05 kg is fired with a velocity of 200 m/s into a lead block of mass 0.95 kg. Given that the lead block can move freely, the final kinetic energy after impact is

A150J

C50J

D200J

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Question 65

jamb 2018

The linear expansivity of brass is 2 x 10\(^{-5}\) C\(^{-1}\). If the volume of a piece of brass is 15.00cm at 0°C, what is the volume at 100°C

A16.03cm\(^3\)

B15.09cm\(^3\)

C16.00cm\(^3\)

D15.03cm\(^3\)

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Question 66

jamb 2018

One of the features of the fission process is that

Ait leads to chain reaction

Bits products are not radioactive

Cneutrons are not released

Dthe of the masses of the reactants equals the sum of the masses of the products

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Question 67

jamb 2018

The pitch of an acoustic device can be increased by

Adecreasing the loudness

Bincreasing the intensity

Cincreasing the frequency

Ddecreasing the intensity

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Question 68

jamb 2018

Which of the following has the lowest internal resistance when new?

ALeclanche cell

BDaniell cell

CTorch battery

DAccumulator

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Question 69

jamb 2018

In the diagram given if the atmospheric pressure is 760mm, the pressure in the chamber G Is

A660mm

B830mm

C690mm

D860mm

View Explanation & Discuss

Question 70

jamb 2018

Which of the following may be used to explain a mirage?
I. Layers of air near the road surface have varying refractive indices in hot weather
II. Road surfaces sometimes becomes invisible in hot weather
III. Light from the sky can be refracted upwards after coming close to the road surface.

AI and III only

BII and III only

CII only

DI, II and III

View Explanation & Discuss

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